Izwa amandla angenakuqhathaniswa nokusebenza kahle kwengalo ye-Kaiyuan rock efakwe ku-Cat 390 Excavator.
I-Rock Arm ye-Excavator, njengengalo eguquliwe enezinjongo eziningi, ifanele ukumba izimayini ngaphandle kokuqhuma, njengezimayini zamalahle omgodi ovulekile, izimayini ze-aluminium, izimayini ze-phosphate, izimayini zegolide zesihlabathi, izimayini ze-quartz, njll. Ibuye ifanele ukumba amatshe okuhlangatshezwane nawo ekwakhiweni okuyisisekelo njengokwakhiwa komgwaqo kanye nokumbiwa kwesisekelo esingaphansi, ukumba amatshe aphansi, ukumba idwala elithambile, i-sandstone, isimo sezulu esithambile njll. Inemiphumela emihle, amandla emishini ephezulu, izinga eliphansi lokuhluleka, amandla aphezulu uma kuqhathaniswa nezando eziphukayo, nomsindo ophansi. I-Rock Arm iyisinqumo sokuqala semishini ngaphandle kwezimo zokuqhunyiswa.